Alarm device for monitoring force moment of tower type crane
A technology for monitoring and alarming devices and tower cranes, which is applied to cranes, transportation and packaging, load hanging components, etc., and can solve problems such as failure to alarm in other abnormal situations and complex tower crane moment alarm devices
Active Publication Date: 2017-02-01
南通腾革建筑机械设备有限公司
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Problems solved by technology
[0002] At present, the tower crane torque alarm devices used in the field of construction engineering are relatively complicated, and cannot alarm for other abnormal conditions
Method used
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[0008] SUMMARY OF THE INVENTION The specific embodiments of the present invention have been described in detail, and will not be repeated here; it should be noted that the pressure value read by the pressure sensing probe 10 is not the downward pulling force received by the boom 4, which requires simple mechanics Calculate the downward pulling force received by the boom 4; the pressure values read by the two pressure sensing probes 10 can be averaged as the pressure value; when the boom 4 undergoes a large deformation, the tower cap 8 is hardly deformed , The infrared rangefinder 1 fixed on the tower cap 8 does not move, but the shading plate 2 fixed on the luffing trolley 3 will have a larger displacement, so the infrared rays of the infrared rangefinder 1 will be projected to the shading plate On the infrared sensing area 13 of 2, even out of the shading plate 2.
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The invention discloses an alarm device for monitoring the force moment of a tower type crane. The device is mainly applied to a tower crane in the field of constructional engineering. The alarm device is simple in structure, reliable in work and capable of giving an alarm in case of other abnormal conditions. The alarm device is mainly composed of an infrared ray distance measurement instrument (1), a light shielding plate (2), pressure sensing probes (10), bearing pads (11), a radio transmission device (14) and a display and alarm device. The main working principle of the alarm device is that when a variable-amplitude trolley (3) of the tower crane hoists cargo and the cargo moves back and forth on a suspension arm (4), infrared rays of the infrared ray distance measurement instrument (1) are cast to a light shielding area (12) of the light shielding plate (2); the infrared ray distance measurement instrument (1) transmits a distance signal to the display and alarm device; meanwhile, pressure signals read by the pressure sensing probes (10) are transmitted to the radio transmission device (14); the force moment borne by the suspension arm (4) is calculated through a built-in chip of the display and alarm device and displayed on the display and alarm device; and when the force moment borne by the suspension arm (4) is greater than a predetermined value, the display and alarm device gives an alarm and cuts off power supply of a hoisting motor of the tower crane.
Description
Technical field [0001] The invention is mainly used for tower cranes in the field of construction engineering. Background technique [0002] At present, the tower crane torque alarm devices used in the field of construction engineering are relatively complicated, and cannot alarm other abnormal conditions. Summary of the invention [0003] The present invention overcomes the above-mentioned shortcomings. It has simple structure, reliable work, and can also give an alarm to other abnormal situations; the present invention mainly consists of infrared rangefinder (1), light shield (2), pressure sensor probe (10), bearing bush (11), radio transmitter (14), display alarm; infrared range finder (1) is fixed with the tower cap (8) of the tower crane, the light shield (2) and the radio transmitter (14) are changed to the tower crane The trolley (3) is fixed, the pressure sensing probe (10) is installed in the bearing (15) of the fixed pulley (7) of the trolley (3), and the shaft (9) of t...
Claims
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IPC IPC(8): B66C23/88B66C13/16
CPCB66C13/16B66C23/88
Inventor 彭宝安
Owner 南通腾革建筑机械设备有限公司